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Riquet F, Comtet T, Broquet T, Viard F. Unexpected collective larval dispersal but little support for sweepstakes reproductive success in the highly dispersive brooding molluscCrepidula fornicata. Mol Ecol 2017; 26:5467-5483. [DOI: 10.1111/mec.14328] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/27/2017] [Accepted: 08/07/2017] [Indexed: 01/16/2023]
Affiliation(s)
- Florentine Riquet
- UPMC Univ Paris 06; UMR 7144; Team Diversity and Connectivity in Coastal Marine Landscapes; Station Biologique de Roscoff; Roscoff France
- CNRS; UMR 7144; Lab. Adaptation and Diversity in the Marine Environment; Station Biologique de Roscoff; Roscoff France
| | - Thierry Comtet
- UPMC Univ Paris 06; UMR 7144; Team Diversity and Connectivity in Coastal Marine Landscapes; Station Biologique de Roscoff; Roscoff France
- CNRS; UMR 7144; Lab. Adaptation and Diversity in the Marine Environment; Station Biologique de Roscoff; Roscoff France
| | - Thomas Broquet
- UPMC Univ Paris 06; UMR 7144; Team Diversity and Connectivity in Coastal Marine Landscapes; Station Biologique de Roscoff; Roscoff France
- CNRS; UMR 7144; Lab. Adaptation and Diversity in the Marine Environment; Station Biologique de Roscoff; Roscoff France
| | - Frédérique Viard
- UPMC Univ Paris 06; UMR 7144; Team Diversity and Connectivity in Coastal Marine Landscapes; Station Biologique de Roscoff; Roscoff France
- CNRS; UMR 7144; Lab. Adaptation and Diversity in the Marine Environment; Station Biologique de Roscoff; Roscoff France
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Riquet F, Le Cam S, Fonteneau E, Viard F. Moderate genetic drift is driven by extreme recruitment events in the invasive mollusk Crepidula fornicata. Heredity (Edinb) 2016; 117:42-50. [PMID: 27118155 PMCID: PMC4901356 DOI: 10.1038/hdy.2016.24] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 03/07/2016] [Accepted: 03/11/2016] [Indexed: 11/09/2022] Open
Abstract
Effective population size (Ne) is a measure of genetic drift and is thus a central parameter in evolution, conservation genetics and invasion biology. Interestingly, in native marine species, Ne is typically several orders of magnitude lower than the census size. This pattern has often been explained by high fecundity, variation in reproductive success and pronounced early mortality, resulting in genetic drift across generations. Data documenting genetic drift and/or Ne in marine invasive species are, however, still scarce. We examined the importance of genetic drift in the invasive species Crepidula fornicata by genotyping 681 juveniles sampled during each annual recruitment peak over nine consecutive years in the Bay of Morlaix (Brittany, France). Observed variations in genetic diversity were partially explained by variation in recruitment intensity. In addition, substantial temporal genetic differentiation was documented (that is, genetic drift), and was attributed to nonrandom variance in the reproductive success of different breeding groups across years in the study species. Using a set of single-sample and temporal estimators for Ne, we estimated Ne to be three or four orders of magnitude smaller than the census size (Nc). On one hand, this reduction in Ne relative to Nc appeared congruent with, although slight higher than, values commonly observed in native marine species. Particular life-history traits of this invasive species may play an important role in buffering genetic drift. On the other hand, Ne still remained far below Nc, hence, possibly reducing the efficiency of selection effects.
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Affiliation(s)
- F Riquet
- UPMC Univ Paris 06, UMR 7144, Team Diversity and Connectivity in Coastal Marine Landscapes, Station Biologique de Roscoff, Roscoff, France
- CNRS, UMR 7144, Laboratory Adaptation and Diversity in the Marine Environment, Station Biologique de Roscoff, Roscoff, France
| | - S Le Cam
- UPMC Univ Paris 06, UMR 7144, Team Diversity and Connectivity in Coastal Marine Landscapes, Station Biologique de Roscoff, Roscoff, France
- CNRS, UMR 7144, Laboratory Adaptation and Diversity in the Marine Environment, Station Biologique de Roscoff, Roscoff, France
| | - E Fonteneau
- UPMC Univ Paris 06, UMR 7144, Team Diversity and Connectivity in Coastal Marine Landscapes, Station Biologique de Roscoff, Roscoff, France
- CNRS, UMR 7144, Laboratory Adaptation and Diversity in the Marine Environment, Station Biologique de Roscoff, Roscoff, France
| | - F Viard
- UPMC Univ Paris 06, UMR 7144, Team Diversity and Connectivity in Coastal Marine Landscapes, Station Biologique de Roscoff, Roscoff, France
- CNRS, UMR 7144, Laboratory Adaptation and Diversity in the Marine Environment, Station Biologique de Roscoff, Roscoff, France
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Broquet T, Barranger A, Billard E, Bestin A, Berger R, Honnaert G, Viard F. The Size Advantage Model of Sex Allocation in the Protandrous Sex-Changer Crepidula fornicata: Role of the Mating System, Sperm Storage, and Male Mobility. Am Nat 2015; 186:404-20. [PMID: 26655357 DOI: 10.1086/682361] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Sequential hermaphroditism is adaptive when the reproductive value of an individual varies with size or age, and this relationship differs between males and females. In this case, theory shows that the lifetime reproductive output of an individual is increased by changing sex (a hypothesis referred to as the size-advantage model). Sex-linked differences in size-fitness curves can stem from differential costs of reproduction, the mating system, and differences in growth and mortality between sexes. Detailed empirical data is required to disentangle the relative roles of each of these factors within the theory. Quantitative data are also needed to explore the role of sperm storage, which has not yet been considered with sequential hermaphrodites. Using experimental rearing and paternity assignment, we report relationships between size and reproductive success of Crepidula fornicata, a protandrous (male-first) gastropod. Male reproductive success increased with size due to the polygamous system and stacking behavior of the species, but females nonetheless had greater reproductive success than males of the same size, in agreement with the size-advantage theory. Sperm storage appeared to be a critical determinant of success for both sexes, and modeling the effect of sperm storage showed that it could potentially accelerate sex change in protandrous species.
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Affiliation(s)
- Thomas Broquet
- Centre National de la Recherche Scientifique, Team Diversity and Connectivity of Coastal Marine Landscapes, Station Biologique de Roscoff, 29680 Roscoff, France; and Sorbonne Universités, Université Pierre et Marie Curie, Unité Mixte de Recherche 7144, Station Biologique de Roscoff, 29680 Roscoff, France
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Riquet F, Daguin‐Thiébaut C, Ballenghien M, Bierne N, Viard F. Contrasting patterns of genome‐wide polymorphism in the native and invasive range of the marine molluscCrepidula fornicata. Mol Ecol 2013; 22:1003-18. [PMID: 23286428 DOI: 10.1111/mec.12161] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/15/2012] [Accepted: 10/29/2012] [Indexed: 01/03/2023]
Affiliation(s)
- Florentine Riquet
- UPMC Univ Paris 06 Team Diversity and Connectivity in Coastal Marine Landscapes UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
- CNRS Laboratory Adaptation and Diversity in the Marine Environment UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
| | - Claire Daguin‐Thiébaut
- UPMC Univ Paris 06 Team Diversity and Connectivity in Coastal Marine Landscapes UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
- CNRS Laboratory Adaptation and Diversity in the Marine Environment UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
| | - Marion Ballenghien
- UPMC Univ Paris 06 Team Diversity and Connectivity in Coastal Marine Landscapes UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
- CNRS Laboratory Adaptation and Diversity in the Marine Environment UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
- Université Montpellier 2 Place Eugène Bataillon 34095 Montpellier France
- CNRS Institut des Sciences de l'Evolution Laboratory Phylogénie et Evolution moléculaire UMR 5554 Université Montpellier 2 Place Eugène Bataillon 34095 Montpellier Cedex 05 France
| | - Nicolas Bierne
- Université Montpellier 2 Place Eugène Bataillon 34095 Montpellier France
- CNRS Institut des Sciences de l'Evolution UMR 5554 Station Méditerranéenne de l'Environnement Littoral, 2 rue des Chantiers 34200 Sète France
| | - Frédérique Viard
- UPMC Univ Paris 06 Team Diversity and Connectivity in Coastal Marine Landscapes UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
- CNRS Laboratory Adaptation and Diversity in the Marine Environment UMR 7144 Station Biologique de Roscoff 29680 Roscoff France
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